Hello,
        I have a bit of code like this:

while( $aref = $sth->fetchrow_arrayref ) {
# Output format  should be
# Clone ID      Collection      Plate   Row     Col     cdna_libr_id    speciesGBACC
                print join( "\t", @$aref ), "\t";
}

Out of 4,856,442 iterations I get 13 of these warnings:
Use of uninitialized value at get_cumulative_plates line 81.

        line 81 is the print/join line.  How can it be possible that that line
would give that error?  In order to get into the loop $aref has to be
assigned to...

        Is there anyway that fetchrow_arrayref could be the cause of it?

      Tim Harsch
      Lawrence Livermore National Laboratory
      IMAGE Consortium
      7000 East Ave., L-448
      Livermore, CA 94550

      [EMAIL PROTECTED]
      (925) 423-1135

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